"under and over" meaning in English

{
  "forms": [
    {
      "form": "under and overs",
      "tags": [
        "plural"
      ]
    }
  ],
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      "expansion": "under and over (plural under and overs)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        {
          "kind": "other",
          "name": "English coordinated pairs",
          "parents": [
            "Coordinated pairs",
            "Terms by etymology"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Firearms",
          "orig": "en:Firearms",
          "parents": [
            "Weapons",
            "Hunting",
            "Military",
            "Tools",
            "Human activity",
            "Society",
            "Technology",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
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          "source": "w"
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      ],
      "glosses": [
        "Synonym of over and under (“type of gun”)"
      ],
      "id": "en-under_and_over-en-noun-sZkt9qLB",
      "links": [
        [
          "over and under",
          "over and under#English"
        ]
      ],
      "synonyms": [
        {
          "extra": "type of gun",
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "over and under"
        }
      ]
    }
  ],
  "word": "under and over"
}

{
  "forms": [
    {
      "form": "under and overs",
      "tags": [
        "plural"
      ]
    }
  ],
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      "expansion": "under and over (plural under and overs)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "Synonym of over and under (“type of gun”)"
      ],
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      "synonyms": [
        {
          "extra": "type of gun",
          "tags": [
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            "synonym-of"
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          "word": "over and under"
        }
      ]
    }
  ],
  "word": "under and over"
}